and like to circle above it; but some kinds are repelled[1] by impure or stagnant water, and are only to be found in the vicinity of clear streams or lakes. The Genji-firefly shuns swamps, ditches, or foul canals; while the Heike-firefly seems to be satisfied with any water. All fireflies seek by preference grassy banks shaded by trees; but they dislike certain trees and are attracted by others. They avoid pine trees, for instance; and they will not light upon rose-bushes. But upon willow trees—especially weeping willows—they gather in great swarms. Occasionally, on a summer night, you may see a drooping willow so covered and illuminated with fireflies that all its branches appear “to be budding fire.” During a bright moonlight night fireflies keep as much as possible in shadow; but when pursued they fly at once into the moonshine, where their shimmering[2] is less easily perceived. Lamplight, or any strong artificial light, drives them away; but small bright lights attract them. They can be lured, for example, by the sparkling of a small piece of lighted charcoal, or by the glow of a little Japanese pipe, kindled in the dark. But the lamping of a single lively firefly, confined in a bottle, or cup, of clear glass, is the best of all lures.
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